Place the puff pastry slices next to each other on a floured work surface and allow to thaw. Drain the plums and collect the juice. Stir 4 tbsp. juice and starch until smooth. Bring the rest of the juice, vanillin sugar and 1 tsp.
cinnamon to the boil. Stir the starch into the boiling juice, bring to the boil, simmer for 2-3 minutes and fold in the plums. Cut 16 circles from the puff pastry with a round cookie cutter (8 cm Ø). Lay the remaining puff pastry on top of each other, roll out and cut out 8 more circles. Place the puff pastry on 2 baking trays lined with baking paper. Whisk the egg yolks and milk, spread the puff pastry thinly and sprinkle 1/2 teaspoon sugar on 12 circles evenly. Bake the trays one after the other in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 10-12 minutes. Remove the puff pastry from the oven and let it cool down on a cake rack. Mix mascarpone, yoghurt, sugar and 1 tsp. cinnamon.
Whisk the egg yolks and milk, spread the puff pastry thinly and sprinkle 1/2 teaspoon sugar on 12 circles evenly. Bake the trays one after the other in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 10-12 minutes. Remove the puff pastry from the oven and let it cool down on a cake rack. Mix mascarpone, yoghurt, sugar and 1 tsp. cinnamon. Pour cream into a piping bag with a small star-shaped spout and chill. Spread plum compote and mascarpone cream over the 12 puff pastry circles without sugar, place the remaining puff pastry circles on top and serve immediately.
Waiting time approx. 15 minutes